File: frag.glsl

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kodi-visualization-spectrum 3.4.0%2Bds1-2
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#version 100

precision mediump float;

uniform float u_pointSize;

varying vec4 v_color;

void main()
{
  if (u_pointSize != 0.0)
  {
    vec2 coord = gl_PointCoord - vec2(0.5);  //from [0,1] to [-0.5,0.5]
    if(length(coord) > 0.5)                  //outside of circle radius?
      discard;
  }
  gl_FragColor = v_color;
}